Support unit for an armrest for construction vehicles and trucks



FIG. 1 is a left side perspective view of a support unit for an armrest for construction vehicles and trucks, showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a support unit for an armrest for construction vehicles and trucks, as shown. 